The Bolt,square Neck, cataloged under National Stock Number 5306-00-265-0779, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-265-0779 |
| Item Name | Bolt,square Neck |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Neck Length | 0.188 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN |
| Head Height | 0.188 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN |
| Fastener Length | 1.250 INCHES NOMINAL IN |
| Thread Length | 1.250 INCHES MINIMUM IN |
| Hardness Rating | 95.0 ROCKWELL C NOMINAL OVERALL |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | BUTTON |
| Thread Direction | RIGHT-HAND |
| Nondefinitive Spec/std Data | 1 TYPE AND 1 STYLE |
| Neck Width | 0.368 INCHES MINIMUM AND 0.388 INCHES MAXIMUM IN |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 29000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.782 INCHES MINIMUM AND 0.844 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| FFB00584TYPE1STYLE1 | 4/1 Identification reference U.S. Government activity |
NSN 5306-00-265-0779 is a Bolt,square Neck, classified under FSC 5306, Bolts. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5306-00-265-0784. Verify interchangeability with system specifications before substitution.
Key specifications for 5306-00-265-0779: Neck Length: 0.188 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN; Head Height: 0.188 INCHES MINIMUM AND 0.208 INCHES MAXIMUM IN; Fastener Length: 1.250 INCHES NOMINAL IN; Thread Length: 1.250 INCHES MINIMUM IN. 17 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.